If wehavetousefossilfuelstomanufacturerenewableplants, doesn’tthatmeanthatrenewablesareuseless? http://feedly.com/k/17rbxeZ Inthispost, MarcoRaugeimakes a fundamentalpointaboutanoftenraisedquestion: ifwehavetousefossilfuelstomanufacturerenewableplants, doesn’tthatmeanthatrenewablesareuseless? Raugei’sansweris a resounding "no". Infact, theEROEIoffossilfuelsactsas a multiplierfortheEROEIofrenewables. ItturnsoutthatifweinvesttheenergyoffossilfuelstobuildrenewableplantswegetanoverallEROEIaround 20 forphotovoltaicsandevenbetterforwind. So, that’sthewaytogoforthetimebeing, untilwegraduallyarrivetocompletelyreplacefossilfuels! (imageabovefrom "TheEnergyCollective") TheEROIandpromiseofPV (andotherrenewables). Tryingtoavoidunnecessaryinconsistencyandconfusion, andtokeepanopenmindand a balancedviewpoint. byMarcoRaugei The energy return on energy investment (acronym: EROI or EROEI) provides a numerical quantification of the benefit that the user gets out of the exploitation of an energy source, in terms of … Seguir leyendo If we have to use fossil fuels to manufacture renewable plants, doesn’t that mean that renewables are useless?